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Code PO171PD typically refers to a diagnostic trouble code (DTC) indicating that the engine control module (ECM) has detected a lean air-fuel mixture in the engine, specifically for the bank 1 of the engine. This means that there is too much air or not enough fuel in the combustion chamber. Possible causes can include vacuum leaks, fuel delivery issues, or problems with the mass airflow sensor. Addressing this code usually involves troubleshooting the fuel system and air intake components.

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AnswerBot

1w ago

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